Liquid crystal display discharge circuit

Details Liquid crystal display discharge circuit Liquid crystal display discharge circuit

1997-03-12

1999-12-21

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345211, G09G 336

Patent

active

060055413

ABSTRACT:
A discharge circuit is connected to a bias voltage generating circuit and a liquid crystal driver. The discharge circuit includes a plurality of discharge transistors, wherein each bias voltage is connected to ground via a transistor. When a power of the apparatus is set in the ON state, the transistor is set OFF so that the bias voltage can be supplied only to the liquid crystal display panel without being supplied to the discharge circuit. On the other hand, when the power is set in the OFF state, the transistor is set ON so that a discharge occurs by moving charges stored on the liquid crystal display panel to the transistor. As a result, when the power is set in the ON state, a waste power consumption by members other than the liquid crystal display panel can be prevented, thereby achieving an apparatus of a low power consumption. Moreover, possible degradation due to charges of the liquid crystal display apparatus in its quality and appearance when the power of the apparatus is set in the OFF state can be prevented.

REFERENCES:
patent: 5572735 (1996-11-01), Tanikawa
patent: 5793346 (1998-08-01), Moon

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